Health — Illness, Parasites, and the Vet

Reptiles hide illness. By the time a problem is visible from across the room, it has often been developing for a while. Learn the early signs.

Signs of a healthy ball python

• Clear eyes, no swelling around the head, no retained eye caps after a shed.
• Clean nostrils, no bubbling, no mucus, no whistling sound when breathing.
• Good muscle tone. The animal should feel firm and substantial, not soft or hollow.
• Body shape is rounded and slightly oval in cross-section. Triangular cross-section (visible spine, flat sides) means underweight.
• Tongue flicking and head movement when alert.
• Clean vent (no smearing, no swelling).
• Smooth, complete sheds in one or two pieces.
• Stable weight in adults, steady gain in juveniles.
• Reasonable feeding response when not in seasonal fast or shed.

Common illnesses — early signs and prevention

Respiratory infection (RI)

• Early signs: faint clicking or whistling on exhale, occasional bubbles at the nostrils, slightly open mouth at rest, increased time spent at the warm hide.
• Late signs: visible mucus, wheezing, mouth held open, head held elevated, lethargy.
• Prevention: correct temperatures (the single biggest factor — cool side too cool is the most common cause), clean enclosure, low stress, full quarantine on new animals.
• First action: bring temperatures to the high end of range, particularly the warm side. Reduce handling. Reassess in 48–72 hours.
• If not resolved or worsening: vet. RI is treated with appropriate antibiotics, often nebulized, sometimes injected. Do not try to treat at home.

Mouth rot (infectious stomatitis)

• Early signs: pinkish or reddish discoloration along the gum line, small amounts of cheesy discharge in the mouth, mild jaw swelling.
• Late signs: visible pus, loose or missing teeth, severe swelling, refusal to eat.
• Prevention: avoid mouth injuries (live prey bites, striking enclosure walls), treat respiratory infections fully, clean water always.
• Action: vet. Does not resolve on its own. Treatment usually includes systemic antibiotics and physical cleaning of affected tissue.

Scale rot / ulcerative dermatitis

• Early signs: discolored belly scales, small blisters along the underside, brown or black scale margins.
• Late signs: open sores, deep ulceration, secondary infection.
• Prevention: do not keep substrate constantly wet. Wet humidity bumps in dry climates are fine; soaking-wet substrate at all times is not. Spot-clean waste immediately.
• Action: dry environment, change to paper towel substrate temporarily, clean affected areas with diluted chlorhexidine. Severe cases need vet attention and antibiotics.

Dysecdysis (incomplete or bad shed)

• Signs: shed coming off in patches, retained eye caps, retained shed at the tail tip, retained shed on toes (not applicable to ball pythons but listed for cross-species reference).
• Prevention: correct humidity, year-round humid hide, rough surface (climbing branch or rough stone) for the snake to rub against.
• Action for retained body shed: warm soak in shallow water for 10–15 minutes, then gently work shed off with damp paper towel or your fingers. Never pull dry skin.
• Action for retained eye caps: do NOT pick at eye caps. Increase humidity, provide a damp moss hide, and the next shed will usually take them. If retained eye caps persist for two consecutive sheds, see a vet.

Burns

• Signs: discolored, hardened, or peeling scales typically along the belly or sides, often near where the snake rests over a heat source.
• Cause: unregulated heat element. Almost always preventable with a thermostat.
• Action: remove from the heat source, cool the area with room-temperature water, see a vet for any burn that breaks the skin or covers more than a small patch. Burns frequently get infected.

Inclusion Body Disease (IBD) and Nidovirus

• These are serious viral diseases of pythons and boas. Symptoms can include neurological signs, regurgitation, RI symptoms that do not resolve, and unusual behaviors.
• IBD is fatal. There is no treatment. An animal with confirmed IBD will die from it. Care is supportive only; the question is days versus weeks, not recovery.
• Diagnosis requires blood work or biopsy from a reptile vet. Suspected case → vet immediately. See the general quarantine subsection below for incoming-animal quarantine principles.

Parasites